Unverified50% confidenceFactExact time
The monthly probability of conception for a 30-year-old woman is approximately 20%.
1
Sources
50%
Confidence
Long-term
Relevance
10/8/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe monthly probability of conception declines with age: approximately 10%–15% at age 35, approximately 8% at age 38, and only 3%–5% at age 40.77% similarUnverifiedSome guidelines recommend that women over 40 proactively undergo fertility evaluation when deciding to try to conceive, without needing to wait.70% similarUnverifiedA forecast published in The Lancet shows that infertility cases among women aged 35 to 49 will increase by 50% within the next decade.66% similar
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